Hugh Algernon Percy, 10th Duke of Northumberland, was born 6 April 1914 in London, Greater London, England, United Kingdom to Alan Ian Percy, 8th Duke of Northumberland (1880-1930) and Helen Magdalan Gordon-Lennox (1886-1965) and died 11 October 1988 Brentford, Greater London, England, United Kingdom of unspecified causes. He married Elizabeth Diana Montagu-Douglas-Scott (1922-2012) 12 June 1946 in London, Greater London, England, United Kingdom.
Children
| Name | Birth | Death | Joined with |
| Caroline Mary Percy (1947) | |||
| Victoria Lucy Diana Percy (1949) | |||
| Julia Helen Percy (1950) | |||
| Henry Alan Walter Richard Percy, 11th Duke of Northumberland (1953-1995) | 1 July 1953 | 31 October 1995 London, Greater London, England, United Kingdom | |
| Ralph George Algernon Percy, 12th Duke of Northumberland (1956) | 16 November 1956 London, England, United Kingdom | Isobel Jane Miller Richard (1958) | |
| Louise Percy (1962-1962) | |||
| James William Eustance Percy (1965) | |||
Footnotes (including sources)
| ‡ General |
|
|
